The oldest family tree in the world has been reconstructed through the analysis of ancient DNA taken from a Stone Age tomb in Britain, according to a new study published Wednesday. Researchers extracted DNA from the bones and teeth of 35 individuals buried at Hazleton North long cairn in the Cotswolds-Severn region, England.
They found that 27 of them were close biological relatives and were from five continuous generations of a single extended family. The group lived around 3700-3600 BC -- approximately 5,700 years ago. Researchers discovered that most of those buried in the tomb were descended from four women who had children with the same man.